Question

Questions regarding equations that involve arithmetic functions, and odd integers being deficient or perfect

score 27 · Answer 1 · 2026-03-25 03:01:14

27

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Questions regarding equations that involve arithmetic functions, and odd integers being deficient or perfect

Published on 25 Mar 2026 - 3:01

score 616 · Answer 2 · 2026-03-21 21:04:40

616

Views

Non-natural transformation example

Published on 21 Mar 2026 - 21:04

score 61 · Answer 3 · 2026-03-25 14:19:17

61

Views

Complex Analysis : A function satisfying certain conditions , a counterexample?

Published on 25 Mar 2026 - 14:19

score 497 · Answer 4 · 2018-05-09 13:28:49

497

Views

An example of non commutative ring where $ab=0$ but $ba\neq0$

Published on 09 May 2018 - 13:28

score 91 · Answer 5 · 2026-03-20 19:23:09

91

Views

Muirhead's inequality -- equality occur

Published on 20 Mar 2026 - 19:23

score 471 · Answer 6 · 2018-05-10 15:22:35

471

Views

Continuous function s.t. $\lim_{n\to \infty }f(nx)=0$ for all $x$, but not $\lim_{x\to \infty }f(x)$.

Published on 10 May 2018 - 15:22

score 808 · Answer 7 · 2026-03-25 13:33:19

808

Views

Show that the union of complete sets is not necessarily complete

Published on 25 Mar 2026 - 13:33

score 158 · Answer 8 · 2026-03-25 22:25:57

158

Views

Examples of problems easy in synthetic but hard in analytic geometry, and vice versa

Published on 25 Mar 2026 - 22:25

score 291 · Answer 9 · 2026-03-23 00:06:39

291

Views

If $D$ be a division ring and $D^$ be finitely generated group then $D^$ is abelian group?

Published on 23 Mar 2026 - 0:06

score 345 · Answer 10 · 2026-03-25 00:00:43

345

Views

A regular, non-Hausdorff, non-normal space

Published on 25 Mar 2026 - 0:00

score 67 · Answer 11 · 2026-03-25 07:42:59

67

Views

Finding a sequence $a_n$ that diverges such that $\|a_n\|$ converges (in $\mathbb{R}$)

Published on 25 Mar 2026 - 7:42

score 57 · Answer 12 · 2018-05-15 10:43:25

57

Views

An example of a sequence of random variables with certain properties.

Published on 15 May 2018 - 10:43

score 69 · Answer 13 · 2026-03-25 19:06:20

69

Views

Is it possible that $H/\mathrm{img}(h) \cong I/\mathrm{img}(i)$ but the groups $H$ and $I$ are not isomorphic?

Published on 25 Mar 2026 - 19:06

score 321 · Answer 14 · 2018-05-18 11:13:06

321

Views

Example of series such that $\sum a_n$ is divergent but $\sum \frac{ a_n}{1+ n a_n}$ is convergent

Published on 18 May 2018 - 11:13

score 598 · Answer 15 · 2018-05-19 12:17:02

598

Views

Any collection of neighborhoods of a dense set cover the space?

Published on 19 May 2018 - 12:17

List Question

Questions regarding equations that involve arithmetic functions, and odd integers being deficient or perfect

Non-natural transformation example

Complex Analysis : A function satisfying certain conditions , a counterexample?

An example of non commutative ring where $ab=0$ but $ba\neq0$

Muirhead's inequality -- equality occur

Continuous function s.t. $\lim_{n\to \infty }f(nx)=0$ for all $x$, but not $\lim_{x\to \infty }f(x)$.

Show that the union of complete sets is not necessarily complete

Examples of problems easy in synthetic but hard in analytic geometry, and vice versa

If $D$ be a division ring and $D^$ be finitely generated group then $D^$ is abelian group?

A regular, non-Hausdorff, non-normal space

Finding a sequence $a_n$ that diverges such that $\|a_n\|$ converges (in $\mathbb{R}$)

An example of a sequence of random variables with certain properties.

Is it possible that $H/\mathrm{img}(h) \cong I/\mathrm{img}(i)$ but the groups $H$ and $I$ are not isomorphic?

Example of series such that $\sum a_n$ is divergent but $\sum \frac{ a_n}{1+ n a_n}$ is convergent

Any collection of neighborhoods of a dense set cover the space?

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